Construction of Irrigation Water Supply Pipeline and Ploughing of Boji Farmers Irrigation scheme. CDA T-001/2018-2019. Coast Development Authority. 18th-Dec-2018 10:00:00. 18th-Dec-2019. Awarded. PROPOSED SEVEN (7NO) BOREHOLE DRILLING, EQUIPING AND PIPELINE EXTENSITION SERVICES IN RARIEDA SUB-COUNTY..